Which of the following groups contain only  biodegradable items?

An ecosystem includes

In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

Which of the statement is incorrect?

If a grass hopper is eaten by a frog, then the energy transfer will be from

Mention one negative effect of our affluent life, style on the environment.

What is meant by a biodegradable waste?

Write the name fand formula of a molecule made up of three atoms of oxygen

Which food chains are advantageous in terms of energy?

Which of the following will have the maximum concentration of harmful chemicals in its body?
Peacock, Frog, Grass, Snake, Grasshopper.

Why are some substances biodegradable and some non-biodegradable?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

Why are crop fields known as artificial ecosystems?

How is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of concern to us? State a cause of this damage.

What are the different methods of waste disposal?

How ecosystem is classified? Explain in detail.

Mention the characteristics of food chain.